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| Description
| - Studie popisuje upravenou metodu HPLC metody na reverzní fázi. Pro stanovení trans- a cis-formy resveratrolu byla použita isokratická eluce s elektrochemickou a UV detekcí. Byl zkoumán průběh izomerace roztoku resveratrolu na denním světle a závislost průběhu izomerace na teplotě. Rovnováhy mezi trans- a cis izomerem bylo dosaženo po 5 hodinách expozice a nebyl zjištěn významný vztah k teplotě (30 -60°C). linearita byla dosažena v rozmezí koncentrací 0,01 - 10 mg l-1. Detekční limit byl 3 g l-1 pro trans-resveratrol a 15 g l-1 pro cis-resveratrol. Trans- a cis-resveratrol byl stanovován ve vybraných červených a bílých vínech z České republiky a v extraktech z rostliny Vitis vinifera. Koncentrace trans-resveratrolu se pohybovala v rozmezí 0.7 - 11 mg l-1, a u cis-resveratrolu od 0.6 do 5.1 mg l-1. (cs)
- The study describes an improved version of the reverse-phase-HPLC method.To determine free resveratrol isomers,the method uses isocratic elution and electrochemical detection with the use of a glassy working electrode at a potential of 0.75 V.The e .ects of important factors -such as the isomerization of standard resveratrol solution in di .used daylight and its dependence on temperature or resveratrol isomerization in wine samples -were investigated.The equilibrium between trans -and cis -isomer was achieved after a 5-h exposure to the daily di .used light and it was not signi .cantly in .uenced by the temperature (30 -60 _ .Linearity was obtained in the concentration range from 0.01 to 10 mgl 1 .The detection limit (S =N ? 3)was 3 l 1 for trans -resveratrol and 15 l 1 for cis -resveratrol.The trans -and cis -resveratrol were determined in selected Czech red and white wines and in the extract from Vitis vinifera plant.The concentration of trans -resveratrol ranged from 0.7 to 11 mg l 1 ,that of cis -
- The study describes an improved version of the reverse-phase-HPLC method.To determine free resveratrol isomers,the method uses isocratic elution and electrochemical detection with the use of a glassy working electrode at a potential of 0.75 V.The e .ects of important factors -such as the isomerization of standard resveratrol solution in di .used daylight and its dependence on temperature or resveratrol isomerization in wine samples -were investigated.The equilibrium between trans -and cis -isomer was achieved after a 5-h exposure to the daily di .used light and it was not signi .cantly in .uenced by the temperature (30 -60 _ .Linearity was obtained in the concentration range from 0.01 to 10 mgl 1 .The detection limit (S =N ? 3)was 3 l 1 for trans -resveratrol and 15 l 1 for cis -resveratrol.The trans -and cis -resveratrol were determined in selected Czech red and white wines and in the extract from Vitis vinifera plant.The concentration of trans -resveratrol ranged from 0.7 to 11 mg l 1 ,that of cis - (en)
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| Title
| - Stanovení resveratrolu pomocí HPLC s elektrochemickou a UV detekcí (cs)
- Rapid method for resveratrol determination by HPLC with electrochemical and UV detection in wines
- Rapid method for resveratrol determination by HPLC with electrochemical and UV detection in wines (en)
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| skos:prefLabel
| - Stanovení resveratrolu pomocí HPLC s elektrochemickou a UV detekcí (cs)
- Rapid method for resveratrol determination by HPLC with electrochemical and UV detection in wines
- Rapid method for resveratrol determination by HPLC with electrochemical and UV detection in wines (en)
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| skos:notation
| - RIV/60461373:22330/04:00012875!RIV/2005/GA0/223305/N
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA525/99/1338), Z(MSM 223300004)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22330/04:00012875
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Resveratrol;isomerization;wine;Vitis vinifera;HPLC;electrochemical detection (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Filip, Vladimír
- Kolouchová, Irena
- Melzoch, Karel
- Šmidrkal, Jan
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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